CN106695079A - Welding method of double-metal composite pipe - Google Patents
Welding method of double-metal composite pipe Download PDFInfo
- Publication number
- CN106695079A CN106695079A CN201710126833.6A CN201710126833A CN106695079A CN 106695079 A CN106695079 A CN 106695079A CN 201710126833 A CN201710126833 A CN 201710126833A CN 106695079 A CN106695079 A CN 106695079A
- Authority
- CN
- China
- Prior art keywords
- welding
- groove
- basic unit
- bimetal pipe
- composite bimetal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000003466 welding Methods 0.000 title claims abstract description 88
- 239000002905 metal composite material Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 9
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- 239000002537 cosmetic Substances 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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- 229910052742 iron Inorganic materials 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials 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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
Abstract
The invention discloses a welding method of a double-metal composite pipe. The welding method comprises the following steps: (1) welding groove treatment: a basic welding surface is machined; a groove is a Y-shaped groove; a single-edge groove angle beta is 30+-5 degrees; and an obtuse edge thickness h is 2-4 mm; (2) prewelding: the TIG or MIG welding is performed; and a lining layer is prevented from being molten in the welding process; (3) the fill welding is performed; (4) welding of the lining layer: the low-current TIG welding is adopted; and (5) the cover surface welding is performed. The welding method improves the joint corrosion resistance, and is simple and convenient in welding process, high in welding efficiency, low in welding cost, free of crisp and hard layers in welding lines and excellent in welding line quality.
Description
Technical field
The invention belongs to welding engineering field, in particular it relates to a kind of welding method of composite bimetal pipe.
Background technology
Composite bimetal pipe is, with carbon steel or low alloy steel as basic unit, with stainless steel or nickel-base alloy as inner liner, to pass through
Specific moulding process, the composite steel tube for combining to form is broadly divided into mechanical composite tube and metallurgical composite pipe.Its comprehensive base tube
The antiseptic property of mechanical performance and internal lining pipe corrosion resistant alloy, is widely used in the industries such as oil, chemical industry and electric power in recent years.It is existing
Composite bimetal pipe weld due to being limited by its space structure, use unilateral welding procedure, i.e., first weld cladding, then
Weldering transition zone, finally welds the welding sequence of basic unit.The selection of welding material generally has two ways, and one kind is to use all steel
Or Ni-based wlding, this kind of selection mode weldquality is preferable and is easy to ensure, but welding cost is very high；Another kind is using various
Wlding is welded, and because the most parts of weld seam use carbon steel wlding, welding cost is substantially reduced, but because using in high-grade material
Upper built-up welding inferior grade wlding, can produce brittle layer, the performance reduction of joint in weld seam.Simultaneously as welded using one side, after
The thermal process again of continuous welding process Jun Shiduiqian roads weld seam, prime coat often occurs superheating phenomenon, especially for thin-walled
Composite bimetal pipe, this greatly reduces the corrosion resisting property of weld seam.
The content of the invention
Be the defect for overcoming prior art to exist, the present invention provide a kind of composite bimetal pipe (including mechanical composite tube and
Metallurgical composite pipe) welding method, can solve that composite bimetal pipe one side weld welding cost is high, joint quality is low and weld seam is resistance to
The problems such as erosion difference.
To achieve the above object, the present invention uses following proposal：
The welding method of composite bimetal pipe, comprises the following steps：
Step one, welding groove treatment；
Step 2, prewelding；
Step 3, filling weldering；
Step 4, inner liner welding；
Step 5, cosmetic welding.
Compared with prior art, the invention has the advantages that：Basic unit is welded using carbon steel and low-alloy wlding, weldering
Connect low cost；Basic unit separately welds with inner liner, does not have transition zone, and welding operation is simple, and welding efficiency is high；Without using in height
Built-up welding inferior grade wlding in grade material, in the absence of brittle layer；Inner liner is last welding position, using low current TIG or
MIG welderings are once soldered, and not only thermal weld stress amount is small, and avoids the superheating phenomenon that follow-up welding operation is caused to it, weldering
Connect quality good, corrosion resisting property is high.
Brief description of the drawings
Fig. 1 is the Y type groove schematic diagrames of composite bimetal pipe；
Fig. 2 is composite bimetal pipe welding procedure schematic diagram；
In figure：1st, basic unit, 2, inner liner, the 3, first layer, the 4, second layer, the 5, the 3rd layer, the 6, the 4th layer, 7,
Five layers.
Specific embodiment
In order that present invention solves the technical problem that, technical scheme and beneficial effect more clear and definite, below in conjunction with
Accompanying drawing embodiment is described in further detail to the present invention, the welding method of the composite bimetal pipe, comprises the following steps：
Step one, welding groove treatment, its processing procedure are as follows：
101st, retaining wall on slope treatment, groove are carried out to the solder side of composite bimetal pipe basic unit 1 using mach mode
Form is Y type grooves, and angle of bevel β is 30 ° ± 5 °, and root face height h is 2~4mm, refers to Fig. 1；
102nd, groove cleaning：Using wire brush and alcohol to being polished and being cleaned in the range of groove and its neighbouring 25cm,
The adverse effect for preventing greasy dirt and iron rust from being caused to weld seam；
103rd, groove group pair：Check retaining wall on slope quality, it is ensured that groove and its near zone it is intact after carry out groove group
Right, groove group is 2~5mm to gap；
Step 2, prewelding：Under inert gas shielding, prewelding is carried out to basic unit 1 using TIG or MIG welderings, form the first layer
3, wlding used is the welding wire close with the same material of basic unit 1 or composition, and welding current is 100~140A, argon flow amount is 8~
12L/min；Small current welding is used in welding process, prevents heat input excessive so that inner liner 2 melts, so as to produce brittle
Tissue；
Step 3, filling weldering：Weldering is filled to basic unit 1 using manual electric arc welding or gas metal-arc welding (MAG),
The second layer 4 and the 3rd layer 5 are formed, the wlding for being used is the welding rod or welding wire close with the same material of basic unit 1 or composition, hand
Work arc welding electric current is 75~105A, and MAG weldering electric currents are 135~170A, gas flow 18L~22L/min；
Step 4, inner liner welding：Under inert gas shielding, inner liner 2 is welded using TIG or MIG internal welding machines,
The 4th layer 6 is formed, the wlding for being used is the stainless steel or nickel-based welding wire with the same material of inner liner 2 or a grade high, welded
Electric current is 80~110A, and argon flow amount is 8~12L/min；In welding process, used as far as possible on the premise of penetration is ensured
Small current welding, prevents welding current excessive, causes dilution rate to become big and beneficial element scaling loss, reduces the corrosion resisting property of weld seam；
Step 5, cosmetic welding：Cosmetic welding is carried out to basic unit 1 using manual electric arc welding, the 5th layer 7 is formed, is used
The wlding welding rod used with filling weldering is identical, and welding current is 80~115A；Whole welding process refers to Fig. 2.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Design is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of welding method of composite bimetal pipe, it is characterised in that comprise the following steps：
Step one, welding groove treatment；
Step 2, prewelding；
Step 3, filling weldering；
Step 4, inner liner welding；
Step 5, cosmetic welding.
2. the welding method of composite bimetal pipe according to claim 1, it is characterised in that step one processing procedure is such as
Under：
101st, retaining wall on slope treatment, groove type are carried out to the solder side of composite bimetal pipe basic unit 1 using mach mode
It is Y type grooves, angle of bevel β is 30 ° ± 5 °, and root face height h is 2~4mm；
102nd, groove cleaning：Using wire brush and alcohol to being polished and being cleaned in the range of groove and its neighbouring 25cm, prevent
The adverse effect that greasy dirt and iron rust are caused to weld seam；
103rd, groove group pair：Check retaining wall on slope quality, it is ensured that groove and its near zone it is intact after carry out groove group pair, slope
Mouth group is 2~5mm to gap.
3. the welding method of the composite bimetal pipe according to claim 1-2, it is characterised in that step 2 method is as follows：
Under inert gas shielding, prewelding is carried out to basic unit using TIG or MIG welderings, form the first layer, wlding used is and the same material of basic unit
Matter or the close welding wire of composition, welding current are 100~140A, and argon flow amount is 8~12L/min；Using small in welding process
Electric current is welded.
4. the welding method of the composite bimetal pipe according to claim 1-3, it is characterised in that step 3 method is as follows：
Weldering is filled to basic unit using manual electric arc welding or gas metal-arc welding (MAG), the second layer and the 3rd layer is formed,
The wlding for being used is the welding rod or welding wire close with basic unit's same material or composition, and manual electric arc welding electric current is 75~105A, MAG
Weldering electric current is 135~170A, gas flow 18L~22L/min.
5. the welding method of the composite bimetal pipe according to claim 1-4, it is characterised in that step 4 method is as follows：
Under inert gas shielding, inner liner 2 is welded using TIG or MIG internal welding machines, form the 4th layer, the wlding for being used
It is the stainless steel or nickel-based welding wire with inner liner same material or a grade high, welding current is 80~110A, argon flow amount is 8~
12L/min；In welding process, small current welding is used as far as possible on the premise of penetration is ensured.
6. the welding method of the composite bimetal pipe according to claim 1-5, it is characterised in that step 5 method is as follows：
Cosmetic welding is carried out to basic unit using manual electric arc welding, the 5th layer, the wlding for the being used welding rod used with filling weldering is formed
Identical, welding current is 80~115A.
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| CN107030359A (en) * | 2017-06-01 | 2017-08-11 | 中国石油大学(华东) | Bimetallic mechanical is combined tube end resistance spot welding process |
| CN107252977A (en) * | 2017-07-21 | 2017-10-17 | 上海交通大学 | A kind of single fillet welded methods of laser+MIG/MAG |
| CN108500429A (en) * | 2018-06-07 | 2018-09-07 | 中国石油大学(华东) | A kind of welding method of composite bimetal pipe |
| CN108907419A (en) * | 2018-07-20 | 2018-11-30 | 四川汇源钢建装配建筑有限公司 | A kind of single V groove with root face welding method and weldment |
| CN110216357A (en) * | 2019-05-28 | 2019-09-10 | 中钢不锈钢管业科技山西有限公司 | A kind of manufacturing method of bimetallic composite welded pipe |
| CN111014899A (en) * | 2019-12-20 | 2020-04-17 | 中国人民解放军63926部队 | High-temperature-resistant steel butt welding method |
| CN111673217A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Method for welding composite board on single surface by adopting ceramic liner |
| CN111843105A (en) * | 2020-07-28 | 2020-10-30 | 沧州隆泰迪管道科技有限公司 | Automatic backing welding process for prefabrication of bimetal composite pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107030359A (en) * | 2017-06-01 | 2017-08-11 | 中国石油大学(华东) | Bimetallic mechanical is combined tube end resistance spot welding process |
| CN107030359B (en) * | 2017-06-01 | 2020-01-14 | 中国石油大学(华东) | Bimetal mechanical composite pipe welding process |
| CN107252977A (en) * | 2017-07-21 | 2017-10-17 | 上海交通大学 | A kind of single fillet welded methods of laser+MIG/MAG |
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| CN111014899A (en) * | 2019-12-20 | 2020-04-17 | 中国人民解放军63926部队 | High-temperature-resistant steel butt welding method |
| CN111014899B (en) * | 2019-12-20 | 2021-10-22 | 中国人民解放军63926部队 | High-temperature-resistant steel butt welding method |
| CN111673217A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Method for welding composite board on single surface by adopting ceramic liner |
| CN111843105A (en) * | 2020-07-28 | 2020-10-30 | 沧州隆泰迪管道科技有限公司 | Automatic backing welding process for prefabrication of bimetal composite pipeline |
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